Coating composition



Patented Mar. 2, 1926.

UNITED STAES AUGUST BENSON, OF'CHIGAGO, ILLINOIS.

coA'rIno comrosrrron.

No Drawing.

To all whom it may concern:

Be it known that I, AUGUST BENSON, a.

citizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented new and useful, Improvements inCoating Compositions, of which the following is a specification.

This invention relates to a'compound for coating walls, vases and othersurfaces where an ornamental eli'ect is desired. 0

An object of the invention is the provision of a compound for coatingthe surfaces of such body materials as wood, glass, clay and in fact anycomposition or material since the coating is of a character as not to beafi'ected by the materials of the ob ect treated.

Another object of the invention is the provision of a coating-for thesurfaces of ob- 'ects which will give not only a brilliant lustre but apleasing color effect to the ob- 'ect.

J A further object of the invention is the provision of a coating forthe surfaces of.

objects presenting a brilliantlustre, a phosphorescent background and Iat the same time furnishing a hard coating lackin brittleness-whichwill'resist destruction uring cleaning.

In carrying out my invention I thoroughly mix equal parts by weightofpowdered white magnesite, silica, in the form of fine sand, andinfusorial earth. Themixture is placed in a suitable container andheatedto 1300 F.-for one hour. The chemical reaction which takes place duringheating causes the mixture'to become :a granulated mass. The granulesare removed from the container when cool and ground to a fine powder. 1a The magnesite provides an alkali which gives body and stability to thecompound which is insoluble in ordinary liquids: The silica orv sand isneutralized by the alkali,

and forms a filler while the infusorial earth acts as a flux. I Asolution of magnesium chloride, 30

Baum, is added to andthoroughly stirred into the powdered mass untilitbecomes the consistency of thick cream- The so lntion of magnesiumchloride being a heavy fluid acts as a binder of the mass. The creamysolution is of .a semi-transparent nature and is now in condition to beapplied-directly to surfaces of objects Applicationflled July 19} 1924.Serial no. 727,059.

after the addition of some pigment which 'will give adesired effect.

As it is intended that the coating shall be of a luminous character oneof the so-called mminous powders is added to the cream before itsapplication to a surface. Such luminous in European countries. Whilethese pow-- ders per se form no part of the present invention, the basicprinciples of the powders are summed up as follows.

The illuminating effect of phosphorescent masses obtained by heatingstrontium thiosulphate or barium thiosulphate is considerably increasedby the addition before heatmg of small quantities of the nitrates ofpowders are commercially well known uranium, bismuth or thorium. Theproduct formed from strontium thiosulphate is more luminous than that ofthe barium compound. Calcium thiosulphate may be employed without theaddition of the nitrates since the nitrates do not aid the luminousqualities of the calcium salt.

Among the best luminous lowin are examples 0 I. ne hundred parts, byweight, of strontium' carbonate; 100 parts, by weight, of sulphur; 0.5parts, by weight, of potassium chloride; 0.5 parts, by weight, of sodiumchloride; 0.4 parts, by weight, of manganese chloride. The materials areheated for paints the folthree-quarters of an hour to one hour, to

about 2,372 F. light.

. 11. One hundred parts, by weight, of strontium carbonate; 30 parts, byweight, of sulphur; 2 parts, by Weight, of sodium car- The product givesa violet sulphate. The method of treatmentis the sarlrlie as in thefirst, the phosphorescence deep ye ow.

III. Sixty parts, by weight, of strontium bonate; 0.5 parts, by weight,of sodium, chloride; 0.2 parts, by weight, of manganese thiosulphate; 12parts, by weight, of a 0.5

per cent acidified alcholic solution of hismuth nitrate; 6 arts byweight, of a 0.5 per cent alcholic so ution of uranium nitrate. Thematerials are mixed, dried, brought gradually to a temperature of 2,372E, and heated for about an hour. The phosphorescence is emerald green.

IV. Twenty parts, by weight, of'calcium oxide (burnt lime) free fromiron; 6 parts, by Weight, of sulphur; 2 parts, by weight, of starch; 1part, by weight, of a 0.5 per coating of the fine particles of glass.

cent solution of bismuth nitrate; 0.15 parts, by weight, of potassiumchloride; 0.15 parts, by Weight, of sodium chloride. The materials aremixed, dried, and heated to 1,300

C. (2,372 F.). The product gives a violet light.

These phosphorescent substances are effective afterv exposure to directsunlight, a mercury lamp or after a prolonged exposure to a powerfulincandescent gas light.

A quantity of any of the luminous powders just described is added to thecream, the particular amount depending upon the degree of luminositydesired. The cream is spread over the surface of the object in a thinlayer and while said layer is still soft, granulated glass is applied toprovide an outer surface. The granules of glass vary in size from thesmallest particles to that of a pea and the size employed depends uponthe extent of the surface treated, walls re quiring the largest pellets,while vases and buttons necessitate the use of a size in proportion tothe limited surfaces that are decorated.

The particles of ,glass are efiectually trimmed for the exposure of thegreatest possible number of iridescent surfaces and .at the same timefor the'removal of all sharp projections. The particles of glass must beproperly trimmed for the diffusion of light and toprevent injury topersons coming in contact with the surfaces.

The resultant effect of such a coating is one of great brilliance sincethe phosphorescent background illuminates the surface effects may be hadby the addition of suitable dry lpigments to the cream before the haseen applied.

What I claim is:

1. A semi-transparent surface coating comprising a powdered massconsisting of glass Color equal parts of magnesite, silica andinfusorial earth fused together, anda solution of magnesium chloride.

2. A semi-trans arent surface coating comprising a pow ered massconsisting of equal parts of magnesite, silica and infusorial earthfused to ether at a temperature of approximately 13 0 F and a solutionof magnesium chloride.

3. A semi-transparent surface coating comprising a powdered massconsisting of equal parts of magnesite, silica and infusorial earthfused together at a temperature adding a luminous paint, spreading alayerof the thick cream on the surface and applying granular glass tothe layer to form a surface coating,

5. The process of forming a semi-transparent surface coating whichcomprises heating a mixture of magnesite, silica and infusorial earthuntil the mass has become fused, grindin the mass to a fine,powder andadding a liquid binder to forma paste of the consistency of cream.

6. The process of forming a semi-transparent surface coating whichcomprises heating a mixture of magnesite, silica and a flux to 1300 F.grindin the. mass to a fine powder, adding a so ution, of magnesiumchloride to provide a fluid of the consistency I of cream.

AUGUST BENSON.

